<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>留言板登录</title>
</head>
<body style="background-color: azure;">
    <h2>留言板登录</h2>
    <button>
        <a href="login.php">登录</a>
    </button>
    <button>
        <a href="logout.php">登出</a>
    </button>
    
   <style>
       a{
           text-decoration: none;
       }
   </style>
</body>
</html>